Google Open Source - All of Googles open source projects under a single umbrella
Promoter - The Most Effective Way To Engage And Learn From Customers
LaunchKit - Open Source - A popular suite of developer tools, now 100% open source.
Open Loyalty for Startups - Open source stack for building customer focused products
Open Source @IFTTT - A collection of IFTTT OSS projects.
HelpCrunch - HelpCrunch Live Chat: Turn prospects into customers, drive sales and improve retention with a rich toolbox combining modern live chat, in-app messenger, email marketing, CRM and marketing automation.